Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
tong huong » thong huong, tong thuong, cong huong
hieu lang » chieu sang, hieu quang, hieu van
hanh manh » hanh mang, lanh manh, hoang manh
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan
manh va » hanh va, anh va, minh va
va tong » va thong, va tuong, va trong

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (nhieu tang)) - hanh manh va tong huong ((dan toan) OR (manh toan)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu lang) or (nhieu tang)) - hanh manh va tong huong ((dan toan) OR (manh toan)) ban~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (nhieu tang)) - hanh manh va tong huong ((dan toan) OR (manh toan)) ban*.